28666017 has 24 divisors (see below), whose sum is σ = 42453216. Its totient is φ = 18634176.

The previous prime is 28665983. The next prime is 28666021. The reversal of 28666017 is 71066682.

It is a happy number.

It is not a de Polignac number, because 28666017 - 2⁸ = 28665761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28666217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82438 + ... + 82784.

It is an arithmetic number, because the mean of its divisors is an integer number (1768884).

Almost surely, 2^28666017 is an apocalyptic number.

It is an amenable number.

28666017 is a deficient number, since it is larger than the sum of its proper divisors (13787199).

28666017 is a wasteful number, since it uses less digits than its factorization.

28666017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 28666017 is about 5354.0654646726. The cubic root of 28666017 is about 306.0476985750.

The spelling of 28666017 in words is "twenty-eight million, six hundred sixty-six thousand, seventeen".